SIMPLE  =                    T / conforms to FITS standard                      
BITPIX  =                    8 / array data type                                
NAXIS   =                    0 / number of array dimensions                     
EXTEND  =                    T                                                  
END                                                                             
-------------------------
XTENSION= 'BINTABLE'           / binary table extension                         
BITPIX  =                    8 / array data type                                
NAXIS   =                    2 / number of array dimensions                     
NAXIS1  =                 4096 / length of dimension 1                          
NAXIS2  =                49152 / length of dimension 2                          
PCOUNT  =                    0 / number of group parameters                     
GCOUNT  =                    1 / number of groups                               
TFIELDS =                    1 / number of table fields                         
TTYPE1  = 'I_STOKES'                                                            
TFORM1  = '1024E   '                                                            
PIXTYPE = 'HEALPIX '           / HEALPIX pixelisation                           
ORDERING= 'RING    '           / Pixel ordering scheme, either RING or NESTED   
EXTNAME = 'xtension'           / name of this binary table extension            
NSIDE   =                 2048 / Resolution parameter of HEALPIX                
FIRSTPIX=                    0 / First pixel # (0 based)                        
LASTPIX =             50331647 / Last pixel # (0 based)                         
INDXSCHM= 'IMPLICIT'           / Indexing: IMPLICIT or EXPLICIT                 
END